package com.seamtop.cuber.common.util;
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/**
 *
 * @author Jacker
 */

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import com.seamtop.cuber.common.entriy.CuberContants;
import sun.misc.BASE64Decoder;

public class EncryptUtil
{
    public static String encrypt(String data,String key) throws Exception {
        try {
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            int blockSize = cipher.getBlockSize();
            byte[] dataBytes = data.getBytes();
            int plaintextLength = dataBytes.length;
            if (plaintextLength % blockSize != 0) {
                plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
            }
            byte[] plaintext = new byte[plaintextLength];
            System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);

            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(key.getBytes());
            cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
            byte[] encrypted = cipher.doFinal(plaintext);
            return new sun.misc.BASE64Encoder().encode(encrypted);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    public static String desEncrypt(String data,String key) throws Exception {
        try
        {
            byte[] encrypted1 = new sun.misc.BASE64Decoder().decodeBuffer(data);
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(key.getBytes());
            cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
            byte[] original = cipher.doFinal(encrypted1);
            String originalString = new String(original);
            originalString = originalString.trim();
            return originalString;
        }
        catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String [] args){
        String  str = "test encrypt string";
        try{
            String res1 = encrypt(str,"1234567812345678");
            String res2 = desEncrypt(res1,"1234567812345678");
            System.out.println("res1:"+res1);
            System.out.println("res2:"+res2);
        }catch (Exception e){
            e.printStackTrace();
        }




    }
}